Getting ready for LF this friday any suggestions for sleep aid?

I heard that I can take Orinithine to sleep but I am having trouble finding it. My second flush did not go so well I was not able to sleep and I was very active during the day. Any suggestions on what to take I am planning on going to a herbalist during my lunch break and I want to get something that will aid me in sleep.
Thank you all so much for your help